Uptime Steward — Quarry Maintenance Supervisor

Martin Marietta; Idaho Springs (CO); On-site; USD 93,000 - 125,000; Full time

Benefits offered by this job

Medical coverage

Dental coverage

Vision coverage

401(k) with company match

Paid time off

Job summary

Martin Marietta seeks a Maintenance Supervisor at the Walstrum Quarry in Idaho Springs, CO to lead plant asset health and crew safety. You’ll ensure uptime for crushers, conveyors, screens and pumps while driving PM strategies and rapid corrective actions.

Collaboration with Plant Manager is essential to meet safety, production and efficiency goals. You will mentor technicians, enforce LOTOTO practices, and manage daily planning and staffing for a 4MTPY hard rock operation, aligning resources

Qualifications

• High school diploma, GED, or relevant experience.
• 4+ years in Heavy Industrial Maintenance (Aggregates, Mining, or Construction preferred).
• Experience leading maintenance teams and scheduling.
• Knowledge of MSHA regulations and safety protocols.

Responsibilities

• Conduct daily MSHA pre-shift inspections of equipment and work areas to identify hazards.
• Develop and execute daily and weekly maintenance schedules, prioritizing the backlog with Plant Manager.
• Oversee repair and optimization of stationary and mobile equipment (conveyors, shakers, gearboxes, pumps).
• Mentor junior technicians on safe maintenance practices (LOTOTO).
• Plan and staff maintenance crew for a 4MTPY hard rock quarry.
• Assist in scheduling and timing repairs across equipment at the site.
• Monitor daily operations to ensure production and QC standards; take corrective action when needed.
• Report on safety and production KPIs.
• Ensure compliance with Federal, State and Company safety and environmental rules.
• Develop empowered/self-directed work teams across operations.
• Coordinate purchasing with Controllers; suggest vendors to reduce costs.
• Staffing coordination with Plant Manager and HR for labor-law compliance and affirmative action.
• Supervise performance appraisals, training, promotions, and discipline.
• Contribute to annual HR planning; support employee development and cross-training.
• Maintain inventory levels of parts for uptime (screen panels, GET, bearings, consumables).
• Maintain operation security.

Skills

MSHA regulations

Problem solving

Critical thinking

Effective communicator

Resource management

Safety leadership

Maintenance planning

Education

High school diploma or GED

Job description

Martin Marietta seeks a Maintenance Supervisor at the Walstrum Quarry in Idaho Springs, CO to lead plant asset health and crew safety. You’ll ensure uptime for crushers, conveyors, screens and pumps while driving PM strategies and rapid corrective actions.

Collaboration with Plant Manager is essential to meet safety, production and efficiency goals. You will mentor technicians, enforce LOTOTO practices, and manage daily planning and staffing for a 4MTPY hard rock operation, aligning resources